The Web Workers specification brings multithreading to javascript, allowing HTML5 apps to use background threads to make applications more responsive to user input and better able to leverage today's multi-core CPUs. And it's now supported in all major HTML5 browsers, including Internet Explorer 10. Learn how to use Web Workers to build multithreaded HTML5 apps and see examples of Web Workers in action in this video from Wintellect cofounder Jeff Prosise.